无法在 debian 10 下的 apache2 中启用 php5.6-gd

Unable to enable php5.6-gd in apache2 under a debian 10

我们的系统

我有这个s.o。

# lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 10 (buster)
Release:        10
Codename:       buster

# cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux 10 (buster)"
NAME="Debian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

apache 的实际版本

No, we cannot upgrade it

# apache2 -v
Server version: Apache/2.4.25 (Debian)
Server built:   2019-10-13T15:43:54

这是我们的php

Yes php 5.6 is old and deprecated. We cannot upgrade this old legacy app

# php -v
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20131226/gd.so' - /usr/lib/php5/20131226/gd.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP 5.6.40-0+deb8u12 (cli) (built: Jun 28 2020 09:37:30)
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
    with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend Technologies

问题

如上所示

Unable to load dynamic library '/usr/lib/php5/20131226/gd.so' - /usr/lib/php5/20131226/gd.so:

但它已安装,并且对于 cli 和 apache2,the mods-avaiable\gd.ini 已在各自的 conf.d.

中进行了 simlinked
# apt-get install php5.6-gd
Reading package lists... Done
Building dependency tree
Reading state information... Done
php5.6-gd is already the newest version (5.6.40-52+0~20210701.54+debian10~1.gbpc0026e).

尽管如此,PHP是对的,没有/usr/lib/php5/20131226/gd.so文件。

但是在通用 php 文件夹中有一个 gd.so

find / -name "gd.so"
/usr/lib/php/20131226/gd.so

问题

启用 php5.6-gd 的正确方法是什么?

实际上我这样做是为了解决问题,但我希望有更好的解决方案

cp /usr/lib/php/20131226/gd.so /usr/lib/php5/20131226/gd.so

cd /etc/php5/cli/conf.d
ln -s ../../mods-available/gd.ini 20-gd.ini

cd /etc/php5/apache/conf.d
ln -s ../../mods-available/gd.ini 20-gd.ini

systemctl restart apache2

有效

我还是不明白为什么有些扩展在 /usr/lib/php5 下,而这个却在 /usr/lib/php 下。